An essay by John Wolcott that pinpoints the exact location of a long lost 1614 Dutch Fort in Albany, N.Y.

The following is an essay which may be reprinted in newspapers, magazines and blogs with attribution. For an accompanying press release, see: Researcher Pinpoints Long Lost 1614 Albany Fort, (Aug. 18, 2014).

Contact: John Wolcott, 518-465-8930

Pinpointing Fort Nassau 1614 (Albany)

Location of long lost fort, at long last

By John Wolcott

Fort Nassau: the first Dutch trading house built in North America, was constructed on Castle (Westerlo) Island on the Upper Hudson where Albany, N.Y. is. It was but a small redoubt yet deemed the acorn from which sprouted the American Middle States. This trading post lasted only three years and was badly damaged by a spring freshet and abandoned. Eventually even its ruins were silted over and forgotten.

Historical Map: Fort Nassau Albany, N.Y.In 1796, Albany contemplated a plan to acquire patents for water lots and extend South End streets opposite the north end of Castle Island, out into the Hudson River. It was similar, on a smaller scale, to the way Manhattan expanded out into the Hudson and East Rivers. In the course of finally implementing this in the 1840s, dredging was found necessary to adjust the upper end of Castle Island and Island Creek to accommodate the plan.

At some point, as an incidental result of this dredging, the north side of Fort Nassau’s moat was broken into. This in turn, apparently caused a large washout area to the west and south of the fort’s remains. This temporary re-exposure of Fort Nassau was recorded on a survey of the Upper Hudson conducted in 1861 by the U.S. Coast Survey and printed by them in 1863. I have the good fortune of owning one of these scarce charts. By the way of some slightly painstaking intermediate measures, I transferred the fort’s quadrangle from the 1863 printed chart onto a current satellite image. The little orange square on this satellite image is about 60 foot square, which squares with the only contemporary source for the fort’s quadrangle plan. It’s in a text block on Adriaen Block’s “NIEUNEDER LANDT” chart of 1614. This reads: “Fort van Nassauen is binnen de wallen 58 voeten wydt in’t vierkant.” This will I English as: “Nassau’s Fort has within its walls a 58 foot quadrangle.” This is the little “lump” with a sort of wedge or tail below it on the detail enlargement of the 1863 chart. Close to 60 feet English (American) measure would be 58 feet Rynland Measure.


Don Rittner, archaeologist and president of the Onrust Project, suspects two additional Fort Nassau about half a mile south of that which I have pinpointed – these would be opposite the Normans Kill which flows into Island Creek from the west. One spot of Don’s is on the west bank of Castle Island, there. The first spot seems to be indicated on Block’s Nieuneder Landt chart as referenced to above. The second is on a chart of 1616 two years later. So there could be not one but three sites, although only one is now pin pointed and should be tested A.S.A.P.

Why are we, here, met with such seeming anomalies? I can’t really say considering the paucity of contemporary written sources in this case. Strata, features and artifacts can be “read” in many a good site. Once my pinpointed site is archaeologically tested and explored and the other two suspected places searched, perhaps a nagging and persistent local legend might be affirmed or denied. This legend has it that a French Chateaux was built on Castle Island in 1540 and that Fort Nassau was constructed atop the ruins of the Chateaux.

John R. Wolcott
August 2014

Contact: John Wolcott, 518-465-8930

For a full press release regarding these findings, see: Researcher Pinpoints Long Lost 1614 Albany Fort, (Aug. 18, 2014).

Maps of Fort Nassau

Courtesy of John Wolcott

Map: Fort Nassau Site Today, by John Wolcott

To Download Image (3.6 MB), right-click this link: FortNassau-JohnWolcott.jpg

Graphic: Fort Nassau Site Today, based on John Wolcott’s Findings

To Download Image (2.5 MB), right-click this link: FtNassauGoogleEarth.jpg

Caption: An illustration showing location of Fort Nassau site, based on John Wolcott’s findings.

1614 Chart

Caption: This 1614 chart, attributed to attributed to Adriaen Block, positions Fort Nassau at 43 degrees north latitude. The writings of Joannes de Laet also support this: “On the east lies a long broken island, through which several creeks find a passage, forming several islands, extending nearly to the island on which the fort was erected, in latitude 43˚.” John Wolcott analyzed this early latitude for problems caused by instruments of that time to pinpoint the location on later maps and charts.

Map Detail: “Noort Rivier in Niew Neerlandt”

To Download Image (156 KB), right-click this link: FortNassauMap01.jpg [To download the entire map at full resolution, visit:]

Caption: Map by Johannes Vingboons, “Noort Rivier in Niew Neerlandt,” showing location of abandoned Fort Nassau and Fort Orange on the mainland. The Library of Congress dates the map at 1639. John Wolcott believes the map was actually created earlier, probably in 1626. Image courtesy of Don Rittner.

Map: Fort Nassau Site 1863 Detail, courtesy John Wolcott

To Download Image (2.5 MB), right-click this link: USCoastSurvey-Crop-Detail-CourtesyJohnWolcott.jpg [To download full original map (339 MB), USCoastSurvey-Full-CourtesyJohnWolcott.tif

Caption: Detail showing site of Fort Nassau Courtesy of John Wolcott, from: “Preliminary Chart of Hudson River Sheet No. 3 From Poughkeepsie to Troy New York. From a Trigonometrical Survey under the direction of A.D. BACHE Superintendent of the SURVEY OF THE COAST OF THE UNITED STATES. 1863”

1910 Chart (John Wolcott’s “Rosetta Map”)

To Download Image (2.7 MB), right-click this link: 1910Map-Wolcott.jpg

Caption: John Wolcott used Joannes de Laet’s description of the island fort at “43 degrees” to locate it on an 1863 hand drawn copy of a 1614 map attributed to Adriaen Block. He then analyzed this early latitude for problems caused by instruments of that time to pinpoint the location on later maps and charts.

For a press release regarding Wolcott’s findings, see: Researcher Pinpoints Long Lost 1614 Albany Fort, (Aug. 18, 2014).